APPX
Appendix 4 Remote Buffer Memory
143
A
Details of remote buffer memory areas
The remote buffer memory details of the safety remote I/O module are shown below.
Parameter data per station
■
Transmission interval monitoring time
Set the safety input data transmission interval time of the safety remote I/O module. This time is to be monitored by the master
station.
Set a value that meets all the following calculation formulas for the transmission interval monitoring time.
• TM
SRref
2
• TM
SCmst
2+LS
2
SRref: Safety remote station refresh response processing time
TM: Transmission interval monitoring time
SCmst: Safety cycle time of the master station
*1
LS: Communication cycle interval
*2
If "Communication Period Setting" is set to other than "Basic Period" in "Network Configuration Settings",
multiply LS: Communication cycle interval by the multiple specified in "Multiple Period Setting" in
"Communication Period Setting" in "Basic Setting".
For the setting values of "Transmission Interval Monitoring Time" and "Safety Refresh Monitoring Time" for the
master station, refer to the following.
User's manual for the master station used
*1 For details on the safety cycle time, refer to the following.
User's manual for the master station used
*2 For the communication cycle interval, refer to the following.
User's manual for the master station used
■
I/O LED indication setting at error occurrence
Set whether the input and output points where an error is detected is indicated with an I/O LED.
When "1: Indication of error point" is set, the I/O LED where an error occurs flashes.
The LED flashes with the following errors.
• Double input discrepancy detection error
• Input dark test error
• I/O data error
• Output read-back error
• Output dark test error
For the minor error from which the module can recover, the LED flashing stops when the error is cleared.
The value set in b1 to b15 will be ignored.
Address (hexadecimal)
Name
Setting range
Default value
0000H
Safety setting
Transmission interval
monitoring time
4 to 1000ms
35ms
Address (hexadecimal)
Name
Setting range
Default value
0001H
I/O LED indication setting at error occurrence
0b: No indication of error point
1b: Indication of error point
0b: No indication of
error point
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